What made it difficult for the united states a neutral nation to trade with the central powers

In 4/4 time, two eighth notes are equal to: a.one half of one beat. b.one beat. c.one sixteenth of one beat. d.two beats.

Which of the following was a key accomplishment of the people of songhai? a. they had a strong military and became the largest empire in west africa. b. they established a center of islamic scholarship. c. they worked with iron and prospered from the gold-salt trade. d. they dominated in the trade of ivory, enslaved people, and animal skins.

1u.s. history question! question: how did world war ii change the united states' position in world affairs? i need good explanation to support the answer otherwise i get docked points. real answers only ! you! : )